Production process method and device for preparing n-iso-butyl (n-octyl) (meth) acrylate by transesterification method

The invention discloses a production process method and device for preparing n-isobutyl (n-octyl) (methyl) acrylate by a transesterification method, which comprises the following steps: carrying out pre-dehydration treatment on methyl acrylate and alcohol as raw materials, and carrying out transesterification reaction under the action of an yttrium trifluoromethanesulfonate catalyst and a polymerization inhibitor; a reaction product is subjected to light component removal treatment to obtain a heavy component containing (methyl) acrylic acid R2 alkyl ester product, the heavy component is further separated and extracted in a dividing wall column, and an alcohol-containing light component obtained through light component removal treatment is subjected to extraction separation to obtain an R alcohol product and is extracted. The transesterification reaction is carried out under the homogeneous condition, the reaction condition is relatively mild, the reaction time is short, the target product ...